Yeah. I know. My last post was in May of ’09. sorry about that.
Still here, still knitting. I’m about to start my most ambitious project to date, a mohair shawl known as Haruni (which is the Elvish word for grandmother, per Tolkein). The pattern, which is absolutely awesome, is a free download from Ravelry. (If you don’t have a Ravelry account Chemgrrl has a picture up on her blog)
So I’ve got some really yummy yarn, Claudia’s Handpainted Yarns Kid Mohair in “Just Plum”. I found an amazing shawl pin which matches it perfectly. The pattern calls for the same yardage as in my skein, and states that about half the yardage goes into the border, and states very clearly how many repeats of the base pattern to do before beginning the border.
Still, I’m a bit paranoid about running out of yarn in the middle of the border, so I want a check on how many repeats I can manage. To that end I’m pulling out my algebra skills, so I’ll be able to reassure myself I’m not going to run short.
I don’t have a really good scale, so I’m going to have to rely on measurements. The ball is 217 mm in circumference.
IIRC, circumference is 2π4 and volume is 4/3 πr3
By my calculations, this gives a radius of about 35mm, and a volume of about 179,503mm3.
So, half that volume (89,751mm3) would give a final radius of 28mm and a circumference of 176mm. So I have a way to check myself.
Of course, the first calculations gave me a final circumference of 35mm, which can’t be right, so who knows how far off my math still is…